Which versions of win32evtlogutil are malicious?

The following PyPI versions of win32evtlogutil are flagged malicious: 0.0.1. Treat any of these as compromised.

How do I remediate win32evtlogutil if I installed it?

win32evtlogutil is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed win32evtlogutil — how do I know if it already compromised me?

If win32evtlogutil was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Is win32evtlogutil part of a known attack campaign?

Yes — win32evtlogutil is associated with the 2025-06-diar-ai-basic campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find win32evtlogutil across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for win32evtlogutil (version 0.0.1).

Malicious package

win32evtlogutilPyPI

Advisory published Jun 10, 2025Updated Dec 12, 2025

win32evtlogutil is a confirmed malicious PyPI package (MAL-2025-191934) that steals credentials and exfiltrates sensitive data (malicious version 0.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in win32evtlogutil (PyPI)

MAL-2025-191934

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

pip uninstall win32evtlogutil

What this malware does

Research packages targeting typosquatting and dependency confusions, without really harmful behaviour - just calling home through DNS resolver.

Related to 2025-06-stubsout (using the same remote domain), but without dangerous activity

Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.

Campaign: 2025-06-diar-ai-basic

Reasons (based on the campaign):

The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.
typosquatting

Malicious versions

1 flagged

0.0.1

Indicators of compromise (SHA-256)

30e75e0af47dd83afb6116bda3134d6a3c987b79e163edc7ef25a5199109f88d

5d62d03c43564c8087172222e65beaf334bd9f219291eb6c36a142ad88adef4f

a7ff644c2bc9544b010baeb89cce147f4533d9d5c6a30ed6d416b158a75344d0

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for win32evtlogutil (version 0.0.1).
If you installed it — respond
win32evtlogutil is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If win32evtlogutil was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. win32evtlogutil on PyPI has been identified as a malicious package (version 0.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2025-06-diar-ai-basic

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193)

Detect & block this

O3 blocks win32evtlogutil-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database